Pumping mechanism



Feb. 15, 1927.

A. c. L1A COURv PUMPING MEGHANISM Filed Dec. 16,' 1925 Patented Fee. i is, i927.,

' t ARTHUR enna? coun, onfivirnwns'rffwr? cuir-ue.

rui/irrite. MncHANrs'M.

This invention "relatesto improvements-in oil well pumping mechanism.v ""It'jpertains particularly `to the combination'ofl a normally vstationary swabwithin the u'sualcasing of {anfoil well pumping mechanism, Land voilelevating pumping means.

The object of'my invention fis to provide aswab,` preferably of an elastic typelgsnu'gly withint'hefcasing a normally stationary 'swab through the center of which Va tubular portion of the pumping'mechanism'may reciprocate, the *Huid operated upon lpassin'g up through lthe swab, 'or' rather 'the said tubular portion, vdurji'ngthe movement 'ofthe lat-ten In `order Ithat the objects, 'together'with the results obtained from `my 4cons'tr'uc'tion maybe VbetterV understood before describing such construct-'ion in detail, it'maybe stated lthat it is well lnownthat after long continued pumping of t'hejo'il the casingfh'as jaccu-mulatedjaconsiderable quantity' of y'beauty matter, such Aas paraliine, -which adheresto :Figure 1,1s `a .stem 5 *havingl an 'enlargement '6 threa'de'd'to receive the portion A 'of said Ythevwalls lofthe casing and graduallyicom 'stricts' the -bore thereof until -the puinpi'n'glK 4operation must be stopped to 'p"ern'1it-A the clearingoi' said casing to'reest'ablish a 'free lo'woi'the pumped 1medium.

-Heretofore l't has been 'necessary to with- 'drawtheentire train of'pumping` connections-and lthen to send a 'special swab 'down through the casing, and carried en ,a 4special i portion 'of' thebage terminates in laf stem "12 threaded to frecei'verthe' lower I end 'of one o'fthe' rods "2 "described, `it 4.being y"thus seen that the-said' tubing 9 andits parts are incable, to clear out thevca'singbef'ore s aid `train of connections can be 'iisedior'iurther eiiec'tive work. Due'to this method of freeingthe tube it is seen thattherel is yfirst involved a withdrawalof the said Connections, j

"the ldesired .position` with 'relation to the 'm'enti'on'ed pump bar reL vnot Ashown.

the insertion, of the swab and continued `manipulations thereof followed 'by the replacing of such connections before proper working conditions can be restored` involv-y erably of rubber or equivalentfelasti'c Vtype ing a cost of at least thirty-five vdollars per day 'depending-upon the'conditions andthe depthof the well.

My apparatus is illustrated in they accompanying drawing wherein a preferred arrangement is shown and wherein,

Figure 1 is a longitudinal or vertical section of a casing showing my arrangement f 'th'er'e'inz parts uof 'which are 'also shown in 'longitudinalsection Figure 2 is an *elevation'of'a swab shown in Figure' lA and as enclosed in the; casing 'shown 1n section.

AFigureBisan elevation of portions'cf a pump rod.

VFigure Zl;'isaitransverse sectionof a caging and 'valve on line 4424,".Figure f1," and Eigure iis also ajtra'nsverse section of a ca 'ging on 'line' 5=,"F1gure .1.

'In' the figuresthe numeral'l Adesignates a .part of the casing'through which theoil is Vto'"'beraised, and thoughnot so shownyis connecte'd'inany usual manner to a: pump barrel, "not s'hown, "forming part of such pumping outfits, and in which the usual lifting valves the` saine lying near fthe bottom` of 4the well 'while the parts lcarfrying the saine'extend up intothe casing .land may have vattached may-be Connected' togetherA answering las the v'pi'rmping connections j together `with my ar- "rangement now to'bedeseribed.

j Screwed Vupon fone fof-fthe4 rods 2, v1as in an open cage 7, a crosssection'bf"which is shown in yFigure 5, there being screwed into o V"ajiartB 'saidcage a length vof tubing 9 ,'surmountingwhich isa seat v9 anda cage 10,A the said seat'within the; said' cage receivingajbali-valve '11, 'Tier-example; The Vupterpo'sed' between two" of the said rods 2 at The` swab k-injelukled 'in' 'inventions 'show'nat l3j-in Figures 1 and 2 and is'pref- 'adaptada snugly nt. within teeming, n

has a central longitudinal bore 13V andre! 14 is screwed a nut` 16 which bears against the cap 15 atV that end. The upperend of the tubing 14 also'receives anut 17 spaced -from the uppercap 15 and a coil spring 18 is interposed between said Y nut and cap..

Surrounding the tube 9 and lying between the cage 7 and the swab is a coil spring S" whichV rests upon the cage `but terminates preferably in spaced relation to the swab. The ltubing 9 and the series of rods 2 constitute a continuous pump rod extending throughout the casing 1y and itis to be understood that in the reciprocations of the same the tubing 9 moves up and down within the swab-tubing 14, the swab remaining stationary, freezing to said casing 1.

The column of -oil is raised v.within the' casing in the usualmanne-r and in the recip- Vrocatioiis of the tubing 9 it flows into the cage 7 and up through said tubing and ont beneath and above the ball-valve 11 in the i cage 10, being lifted bulk by bulk.

When the casing becomes coated and clogged with the adhering matter in such manner as to interrupt the'free fiow of oil, the line yof rods is withdrawn from said casing carrying with it the swab, which, in t- Vting snugly, will completely clear the casing atone action sothat the Vreplacement of the .inechanism'permits operations to proceed at once resulting in reducing the expense of such operations from 607% to When pullingv the affair from the casing the spring 8 acts as a buffer in meeting theV swab so thatv there will heno sudden jars in dislodging and moving the latter such as might otherwise occur and cause a cliaiicevparting of the rods.

While I'lliave illustrated andV described a )referred airanvfement as to detail construction itis to be. understoodpthat it is not my intention toadlierestrictly thereto since slight changesmay be made while accomplishing the desired end.

I' claim'f f l V Y 1. In pumping mechanism for oill wells, the combination with a'casing and reciprocating means adapted to'be vinserted insaid casing, of a swab mounted on said means insertable in the casing therewith and normally Vheld in position against and with `respect to the latter by frictional eiigage-inent and hav- Ving a bore, said means extendingrthrough the bore andY adapted to reciprocate therein `rwithvrespectfto the swabduring pumping operations, and such means including at each `"s'ideof the'swab lan extensiongieater in diameter than the bore whereby thefswab is positively moved within the lcasing during Vvthe act ofA inserting or withdrawingrsaid 'means Y Y' 2. In pumping mechanism for oily wells,y

t-lie combination with a casingY and a reoiprocating pumping means, including a valve,

said means adapted to operate in said casing 1 and including a tubular portion, of aswab,

encircling said tubular portion and at its periphery adapted to engage by friction'the walls of the casing whereby to be normally 'held stationary in thelatter, and an elastic member interposed betweeneach end of the swab and a lateral extension of the said means.

4. In pumping mechanism for oil wells,k

the combination with a casing, and a tubular pumping means adapted for insertion into vsaid casing spaced from the casing walls including a valve, of a swab encircling the said tubular pumping means and having therein a tube through which said means extends in "a smooth working fit, said swab being of an elastic nature whereby to conform to the walls of the casing and to frictionally engagev the same and held normally fixed ,with respect thereto, said swab filling thev space between the means and casing walls, said means adaptled to reciprocate within the swab and with respect thereto in the oil pumping operation.

5. In `pumping mechanism 'and casing cleaning device for foil wells, the combination `with a casing, of a swab snugly yfitting y the walls of said casing held by friction to rbe normally stationary inthe same and h`aving a bore, a length of tubing fixed in the bore, pumping means comprising a valving -mechanism and a tube carrying the saine, vthe tube ofsaid means'adapted `to slidably t the tubing of the swab andto reciprocate therein with respect'to it and the swab, a spring on the tube of the said-pumping means at each side of the swab. adapted to receive' the latter againstit as the means is inserted into or .withdrawn from the tube `whereby the said swab is moved relatively to said casing, and nieansto-,fi'x one end of each spring' against movement relatively to said tube of the pumping means. y

In testimony whereof Iaiix my signature.

l ARTHUR c; La conn. 

